-
View all jobs
About Welvaart
At Welvaart, we create technology solutions that put people at the center.
Our close leadership style and flexible culture of growth empower our teams and elevate the quality of our delivery. We combine rigor, innovation, and empathy to drive projects that transform businesses and build lasting relationships of trust.
We complement this vision with a performance‑driven Digital Marketing offering, helping companies strengthen their visibility, enhance their online presence, and accelerate growth through smart, measurable strategies.
Project
Senior Native Mobile Developer with strong experience in Swift (iOS) or Kotlin (Android) to join a project for a German client. You will be responsible for designing, developing, and maintaining high-performance mobile applications, ensuring exceptional user experience and clean, scalable architecture.
Role
At Welvaart, we create technology solutions that put people at the center.
Our close leadership style and flexible culture of growth empower our teams and elevate the quality of our delivery. We combine rigor, innovation, and empathy to drive projects that transform businesses and build lasting relationships of trust.
We complement this vision with a performance‑driven Digital Marketing offering, helping companies strengthen their visibility, enhance their online presence, and accelerate growth through smart, measurable strategies.
Project
Senior Native Mobile Developer with strong experience in Swift (iOS) or Kotlin (Android) to join a project for a German client. You will be responsible for designing, developing, and maintaining high-performance mobile applications, ensuring exceptional user experience and clean, scalable architecture.
Role
- Develop new features and user interfaces based on wireframes, UX flows, and product requirements.
- Ensure the best performance, responsiveness, and user experience across both iOS and Android platforms.
- Identify, troubleshoot, and resolve complex bugs and performance issues.
- Write clean, maintainable, and testable code following best practices and architectural guidelines.
- Collaborate closely with backend developers, UI/UX designers, and cross-functional teams to deliver high‑quality, well‑architected mobile solutions.
- Participate in code reviews, contribute to technical discussions, and mentor more junior developers when needed.
- Ensure adaptability of applications to different screen sizes, OS versions, and device capabilities.
- Maintain strong documentation, including technical designs, API usage, and system flows.
- Contribute to continuous improvement of processes, tooling, and development practices within the team.
- Degree in Computer Science, Software Engineering, or a related field (or equivalent professional experience).
- 5+ years of experience in mobile development, preferably in international or multilingual environments.
- Extensive experience in native mobile development, from first prototype to deployment in the App Store and Google Play Store. Deep knowledge of developing for:
- iOS (Swift)
- Android (Kotlin)
- Strong experience with RESTful APIs and mobile networking libraries (e.g., Retrofit, Alamofire).
- Solid understanding of JSON and data handling on mobile platforms.
- Experience with profiling, debugging, and performance optimization on both iOS and Android.
- Strong understanding of mobile architecture patterns such as MVC, MVP, MVVM, Clean Architecture, and the ability to choose the appropriate one.
- Familiarity with version control using Git.
- Experience with push notifications and handling platform‑specific constraints.
- Excellent knowledge of platform-specific design guidelines (Human Interface Guidelines for iOS, Material Design for Android).
- Testing & Quality
- Experience writing unit and integration tests for mobile apps (e.g., XCTest, JUnit, Espresso).
- Strong focus on code quality, maintainability, and reliability.
- Additional Useful Expertise
- Experience with mobile integrations (e.g., Firebase, Facebook SDK, Analytics, Crashlytics).
- Familiarity with device‑specific capabilities such as GPS, camera, biometrics, or Bluetooth, depending on project needs
- Be part of a tech start-up
- Different scopes of project in different sectors
- Structure of fairness and equity salary (Consultant Profile)
- Training & Certification
- Career Path management
- More than 30 Partnerships
Key Skills
Ranked by relevance
ios
restful apis
wireframes
firebase
android
junit
ux
Related Jobs
3 roles aligned with this opportunity
View Job Details
Related
senior mobile developer
2026-05-29
Full-time
Mid-Senior
Italy
IT Services
Information Technology
View Job Details
Related
Desenvolvedor(a) iOS Pl/Sr
2026-05-27
Full-time
Mid-Senior
Brazil
IT Services
Information Technology
View Job Details
Related
Analista Cyber Threat Intelligence (CTI)
2026-05-25
Full-time
Mid-Senior
Portugal
IT Services
Other
Login to Apply
- Posted
- Mar 26, 2026
- Type
- Full-time
- Level
- Not Applicable
- Location
- Lisbon
- Company
- Welvaart
Industries
IT Services
IT Consulting
Categories
Other
Related Jobs
3 roles aligned with this opportunity
View Job Details
Related
senior mobile developer
2026-05-29
Full-time
Mid-Senior
Italy
IT Services
Information Technology
View Job Details
Related
Desenvolvedor(a) iOS Pl/Sr
2026-05-27
Full-time
Mid-Senior
Brazil
IT Services
Information Technology
View Job Details
Related
Analista Cyber Threat Intelligence (CTI)
2026-05-25
Full-time
Mid-Senior
Portugal
IT Services
Other